1. Clinical Department of Pathology and Cytology, Clinical Hospital Center Rijeka, Rijeka, Croatia
2. Department of Pathology, Faculty of Medicine, University of Rijeka, Rijeka, Croatia
3. Department of Otorhinolaryngology and Head and Neck Surgery, Clinical Hospital Center Rijeka, Rijeka, Croatia
4. Department of Otorhinolaryngology, Faculty of Medicine, University of Rijeka, Rijeka, Croatia
5. Department of Haematology, Clinical Hospital Center Rijeka, Rijeka, Croatia
6. Department of Internal Medicine, Faculty of Medicine, University of Rijeka, Rijeka, Croatia